References
^ Integrated Chinese : Level 2 by Nyan-ping Bi, Yuehua Liu, Tao-chung Yao, Liangyan Ge and Yea-fen Chen (2005, Paperback, Revised, Workbook) ISBN 9780887274626 (revised Jan 2024)^ (2013). Integrated Chinese: Level 1, Simplified Character Edition WORKBOOK 2nd edition ECampus. ISBN 9780887274626 (revised Jan 2024)^ Yao, Tao-Chung; Liu, Yuehua; Bi, Nyan-Ping; Hyden, Jeffrey J.; Wang, Xiaojun (2015). Integrated Chinese: Level 1, Simplified Character Edition WORKBOOK 2nd edition, Cheng & Tsui Co. BiggerBooks. ISBN 9780887274626 (revised Nov 2023)
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